Hair loss treatments are quite expensive; how many sessions are usually required?

Every time I shower and wash my hair, my heart sinks when I look at the drain. It’s like I’m Hansel and Gretel, but seeing hair falling in clumps wherever I walk makes me feel like I’m going crazy...

Especially when I look in the mirror at the hair salon or in the elevator with the lighting shining down from above, the crown of my head and my part line are clearly visible, making me look so thin. Since my hair itself has become weak and thin, even if I use volumizing shampoo and blow-dry it heavily, it just flattens out and sticks flat to my head by lunchtime. Now, there is even a limit to how much I can change the direction of my part.

I am putting off taking medication for now due to concerns about side effects and other issues, and I am thinking of trying procedures like follicular injections or scalp exosomes administered directly to the scalp first.

I'm really scared because there are so many reviews saying that getting the needle stuck in the scalp is pure hell. I'm wondering if it's just enough to make you tear up, or if it's bearable if I apply numbing cream. Also, it seems quite expensive; how many sessions do you usually need?